Chamilo LMS up to 1.11.39/2.0.0 Filters model.ajax.php get_sessions groupOp sql injection

Summaryinfo

A vulnerability identified as problematic has been detected in Chamilo LMS up to 1.11.39/2.0.0. Affected by this vulnerability is the function get_sessions of the file /main/inc/ajax/model.ajax.php of the component Filters. Performing a manipulation of the argument groupOp results in sql injection. This vulnerability is identified as CVE-2026-45146. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Chamilo LMS up to 1.11.39/2.0.0. This affects the function get_sessions of the file /main/inc/ajax/model.ajax.php of the component Filters. The manipulation of the argument groupOp with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Chamilo LMS is an open-source learning management system. Prior to 1.11.40 and 2.0.1, an authenticated administrator can call the get_sessions action in /main/inc/ajax/model.ajax.php with _search=true and a crafted JSON filters parameter whose groupOp field contains SQL syntax. Because groupOp is not restricted to the expected AND or OR operators before it is incorporated into query logic, attacker-controlled input is interpreted by the database and enables blind or time-based SQL injection. Successful exploitation can disclose sensitive user, course, session, configuration, password-reset, and administrative data, modify or delete records subject to database privileges, and cause denial of service through expensive delayed queries. This issue is fixed in versions 1.11.40 and 2.0.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-45146 since 05/08/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The exploitation needs additional levels of successful authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

By approaching the search of inurl:main/inc/ajax/model.ajax.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.11.40 or 2.0.1 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• Chamilo

Name

• LMS

Version

• 1.11.0
• 1.11.1
• 1.11.2
• 1.11.3
• 1.11.4
• 1.11.5
• 1.11.6
• 1.11.7
• 1.11.8
• 1.11.9
• 1.11.10
• 1.11.11
• 1.11.12
• 1.11.13
• 1.11.14
• 1.11.15
• 1.11.16
• 1.11.17
• 1.11.18
• 1.11.19
• 1.11.20
• 1.11.21
• 1.11.22
• 1.11.23
• 1.11.24
• 1.11.25
• 1.11.26
• 1.11.27
• 1.11.28
• 1.11.29
• 1.11.30
• 1.11.31
• 1.11.32
• 1.11.33
• 1.11.34
• 1.11.35
• 1.11.36
• 1.11.37
• 1.11.38
• 1.11.39
• 2.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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